CN219508393U - Waterproof system structure for repairing ballastless track railway bridge deck waterproof layer - Google Patents
Waterproof system structure for repairing ballastless track railway bridge deck waterproof layer Download PDFInfo
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- CN219508393U CN219508393U CN202223115055.6U CN202223115055U CN219508393U CN 219508393 U CN219508393 U CN 219508393U CN 202223115055 U CN202223115055 U CN 202223115055U CN 219508393 U CN219508393 U CN 219508393U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The utility model relates to a waterproof system structure for repairing a ballastless track railway bridge deck waterproof layer, which comprises a bridge deck concrete base layer, a waterproof bottom coating layer arranged above the bridge deck concrete base layer and a waterproof top coating layer coated on the waterproof bottom coating layer, wherein the waterproof bottom coating layer is a double-component polyurethane coating, and the waterproof top coating layer is an aliphatic polyurethane coating. The waterproof system structure combines the traditional waterproof layer and the surface coating into a whole, has the high physical and mechanical properties of the traditional waterproof layer and the high weather resistance and ageing resistance of the surface coating, and meets the requirements of national ballastless track concrete bridge surface waterproof standard or technical condition.
Description
Technical Field
The utility model belongs to a ballastless track railway bridge deck waterproof layer repairing technology, and particularly relates to a waterproof system structure for repairing a ballastless track railway bridge deck waterproof layer.
Background
The railway concrete bridge is designed based on durability, and a waterproof layer is required to be arranged on a bridge deck in the construction process of the railway concrete bridge so as to avoid the accelerated damage and destruction of a bridge structure caused by rainwater infiltration, thereby being an important technical means for improving the durability of the bridge structure.
The railway concrete bridge in China is generally waterproof by using coiled materials or paint, relatively speaking, the paint used as a waterproof layer has the defects of difficult lap joint, poor adhesion, unsatisfactory detail treatment effect and the like of the coiled materials, and the adoption of high-performance paint is the development trend of railway concrete bridge surface waterproof. In the early-stage high-speed railway construction of China, high-performance waterproof paint is widely used by referring to foreign experience, wherein a large amount of polyurea is used for a bridge deck waterproof layer of a CRTS II type plate-type ballastless track. However, in the later operation and maintenance process, it is found that the yellowing, damage and even peeling diseases of part of the polyurea waterproof layer are gradually generated.
The maintenance work of the railway in the current operation of China is mainly concentrated on window period, namely 0:00-4:00 at night, and the railway is maintained by going up the stairs through the operation door. The maintenance time is short, the processes of checking the upper operation door and the lower operation door are removed, the real construction time is possibly less than 3 hours, and large-scale mechanical equipment cannot be transported to the construction site of the bridge deck through the operation door. The existing ballastless track railway bridge related waterproof technical standard is mainly aimed at newly-built railway projects, the waterproof system is complex in structure, construction interval periods among working procedures are long, and difficulty is brought to maintenance of bridge deck waterproof layer diseases.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a waterproof system structure for repairing a bridge deck waterproof layer of a ballastless track railway and a construction method thereof, and solves the problem of difficult maintenance of the bridge deck waterproof layer of the existing ballastless track.
The technical scheme adopted by the utility model is as follows:
the waterproof system structure for repairing the ballastless track railway bridge floor waterproof layer comprises a bridge floor concrete base layer, a waterproof bottom coating layer arranged above the bridge floor concrete base layer and a waterproof top coating layer coated on the waterproof bottom coating layer, wherein the waterproof bottom coating layer is a double-component polyurethane coating, and the waterproof surface coating layer is an aliphatic polyurethane coating.
Further, the coating amount of the waterproof primer layer is not less than 0.4 kg/square meter.
Further, the coating weight of the waterproof surface coating is more than or equal to 0.8 kg/square meter, and the dry film thickness is no more than 0.6mm.
Further, the waterproof coating also comprises a primary waterproof layer, a groove is formed on the primary waterproof layer after the disease of the primary waterproof layer is removed, and the edge of the waterproof base coat is lapped on the groove.
Furthermore, one end of the bridge floor concrete base layer is provided with an anti-collision wall or a water retaining table, and the waterproof base coat is coated on the anti-collision wall or the water retaining table, and the height is 5-15cm.
Further, a rainwater pipe is arranged on the bridge floor concrete base layer, and the waterproof bottom coating is excessively coated on the inner wall of the pipeline of the rainwater pipe from the bridge floor concrete base layer and stretches into the rainwater pipe by 3-7cm.
The utility model has the positive effects that:
the waterproof system structure combines the traditional waterproof layer and the surface coating into a whole, has the high physical and mechanical properties of the traditional waterproof layer and the high weather resistance and ageing resistance of the surface coating, and meets the requirements of national ballastless track concrete bridge surface waterproof standard or technical condition. During construction, large-scale equipment is not needed, and the bridge deck repairing device can be completed by using a traditional small tool, so that the condition that the bridge deck repairing device cannot carry large-scale equipment tools is met.
Meanwhile, the waterproof system has the advantages of simplified structure, no redundant design, reduced construction procedures, more convenient construction and higher construction efficiency, and is particularly suitable for maintenance construction in the window period of an operation railway, and the maintenance is simpler and more convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment 1 of the present utility model;
FIG. 2 is a schematic structural diagram of embodiment 2 of the present utility model;
FIG. 3 is a schematic structural diagram of embodiment 3 of the present utility model;
FIG. 4 is a schematic structural diagram of embodiment 4 of the present utility model;
fig. 5 is a schematic structural diagram of embodiment 5 of the present utility model.
Detailed Description
In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.
Example 1
The embodiment discloses a waterproof system structure for repairing a ballastless track railway bridge deck waterproof layer, which comprises a bridge deck concrete base layer 1, a waterproof bottom coating layer 2 arranged on the bridge deck concrete base layer 1 and a waterproof top coating layer 3 arranged on the waterproof bottom coating layer 2, as shown in figure 1.
The waterproof primer layer 2 is a two-component polyurethane primer, the coating amount is not less than 0.4 kg/square meter, preferably aliphatic isocyanate is adopted, the weather resistance is good, the component is small, and the penetrating power is strong.
The waterproof surface coating 3 is formed by curing high-performance aliphatic polyurethane surface coating at normal temperature, the coating weight is less than or equal to 0.8 kg/square meter, the dry film thickness is less than or equal to 0.6mm, the tensile strength is less than or equal to 10MPa, and the elongation at break is less than or equal to 300%, so that the waterproof surface coating formed by curing has the high physical and mechanical properties of a waterproof layer in a traditional waterproof system and the high weather resistance and ageing resistance of the surface coating.
Example 2
The embodiment aims at the situation that the original waterproof layer of the railway bridge deck has slight disease and only needs to be locally repaired. As shown in fig. 2, this embodiment further includes a raw waterproof layer 5 on the basis of embodiment 1, when the impact drill with a flat spade head is used to clean the reserved place of the raw waterproof layer 5 around the disease, the method should be performed inwards, the raw waterproof layer 5 without the disease is reserved, a groove 4 is formed on the raw waterproof layer 5, and the waterproof bottom layer 2 which is repaired later is overlapped with the groove 4 to form an integral waterproof layer.
Example 3
In this example, as shown in fig. 3, when the disease point is located near the position of the base plate 6, the waterproof primer layer 2 and the waterproof surface coating 3 are not applied to the base plate 6, and overlap joint is performed with the groove 4 formed by the original waterproof layer under the base plate.
Example 4
As shown in fig. 4, the embodiment is suitable for the position of the disease on the wall surface anti-collision wall or the water blocking table 7, and the waterproof bottom coating 2 and the waterproof top coating 3 need to be painted on the anti-collision wall or the water blocking table at the moment, and the height is 5-15cm, preferably about 10 cm.
Example 5
As shown in fig. 5, this embodiment is suitable for the case where the rain pipe 8 is provided on the bridge floor concrete base layer 1, at this time, the waterproof primer layer 2 and the waterproof topcoat layer 3 are required to be painted from the bridge floor concrete base layer 1 onto the inner wall of the rain pipe 8, the pipe 3-7cm, preferably 5cm, extending into the rain pipe 8 is required, and the waterproof primer layer 2 and the waterproof topcoat layer 3 in the rain pipe 8 are suitably made thin, facilitating the installation of the rain pipe cover.
Example 6
The embodiment provides a construction method of a waterproof system for repairing a ballastless track railway bridge deck waterproof layer, which specifically comprises the following steps:
s1: brushing a double-component polyurethane primer on the bridge floor concrete base layer to serve as a waterproof bottom coating;
s2: and (3) coating a high-performance aliphatic polyurethane surface coating on the surface-dried waterproof base coating to form the waterproof surface coating.
Wherein, the surface treatment of the bridge floor concrete base layer 1 is carried out before the step S1, specifically: the original waterproof layer 5 remained on the surface of the bridge floor concrete base layer 1 is preferably removed by adopting a percussion drill with a flat shovel head, and the inclination angle between the flat shovel head and the bridge floor is not more than 15 degrees during shoveling, so that pit damage to the bridge floor concrete base layer is prevented. After the original waterproof layer 5 is processed, the surface of the bridge floor concrete base layer is cleaned by adopting a disc grinder, and scum, floating soil, hollowness, looseness and honeycomb pitted surface on the surface of the bridge floor concrete base layer are cleaned, and the clean and compact concrete base layer is exposed.
After the bridge floor concrete base layer is cleaned, a brush is adopted to carry out waterproof priming construction on the bridge floor drain outlet, the corner, the vertical wall and the like, and a roller brush is adopted to carry out waterproof priming construction on a large-area part. The waterproof base coat is applied by roller coating, brushing uniformly, without exposing the bottom surface and piling.
The waterproof base coat 2 is formed by the reaction and solidification of a double-component polyurethane primer at normal temperature, the coating weight is not less than 0.4 kg/square meter, and the surface drying time is preferably 60-90 min. The polyurethane primer is preferably aliphatic isocyanate, and has good weather resistance, small component and strong penetrability. The double-component polyurethane primer is prepared by slightly stirring the double-component raw materials uniformly before use, accurately weighing and preparing the double-component raw materials according to the proportion required by the use specification of the product, and preparing the double-component polyurethane primer. After weighing, the materials are fully stirred until the materials are uniform, the bottom coating which is uniformly stirred and mixed is subjected to bubble breaking treatment by adopting a vacuum bubble breaking mode, and then the construction of roller coating and brush coating is carried out.
After the waterproof primer layer 2 is constructed, the base layer should stand for enough time, and the waterproof surface coating construction can be carried out after the surface of the primer is confirmed to be dry. The brush is suitable for carrying out waterproof surface coating construction on the bridge deck water outlet, the corner, the vertical wall and the like, and the roller brush is suitable for carrying out waterproof surface coating construction on the large-area part. The waterproof surface coating is applied by roller coating and brushing uniformly, and the waterproof surface coating does not flow and show bottoms, does not scratch or crack, and does not peel off or bulge.
The waterproof surface coating 3 is formed by curing high-performance aliphatic polyurethane surface coating at normal temperature, the coating weight is not less than 0.8 kg/square meter, and the surface drying time is preferably 90-120 min. The surface coating is preferably a high-performance aliphatic polyurethane surface coating, and the waterproof surface coating formed by curing the high-performance aliphatic polyurethane surface coating with tensile strength of 10MPa and elongation at break of 300 percent has the high physical and mechanical properties of a waterproof layer in a traditional waterproof system and the high weather resistance and ageing resistance of the surface coating.
The bridge floor concrete base layer 1 is preferably processed and constructed in one or more window periods, the waterproof bottom coating and the waterproof top coating are preferably processed and constructed in the same window period, and the influence of dust brought by the running of a train, rainwater, dew formation and other environmental factors on the construction quality of the waterproof layer during the construction of the waterproof layer in multiple window periods can be effectively avoided. After the construction of the waterproof surface coating 3 is completed, enough time is reserved until the train runs to the repair construction position, and the influence of dust and sundries brought by the running of the train on a waterproof system is reduced after the surface of the waterproof surface coating is dried.
The double-component polyurethane primer and the high-performance aliphatic polyurethane top coating related to the utility model have been widely applied to different construction processes and other anti-corrosion fields, but the two materials are combined together to be used as a ballastless bridge deck repair waterproof layer or are finished for the first time, and the double-component polyurethane primer and the high-performance aliphatic polyurethane top coating are applied to a bridge deck repair test section, so that the effect is good.
Compared with the prior art, the utility model has the following advantages:
(1) The traditional waterproof layer and the surface coating are combined into a whole, the waterproof layer has high physical and mechanical properties of the traditional waterproof layer and high weather resistance and ageing resistance of the surface coating, and meets the requirements of national ballastless track railway concrete bridge surface waterproof standard or technical conditions.
(2) The structure is simplified, the redundancy design is avoided, the construction procedures are reduced, the construction is more convenient and rapid, the construction efficiency is higher, and the method is particularly suitable for maintenance construction of an operation railway in a window period.
(3) The waterproof bottom coating and the waterproof top coating can be constructed in one window period, so that the influence of dust brought up by train operation during multi-window period construction, rainwater, dew and other environmental factors on the construction quality of the waterproof layer is avoided, the fault tolerance is higher, and the construction quality is more stable.
(4) Construction is completed without large equipment by using a traditional small tool, and the condition that the bridge deck is repaired and tools of the large equipment cannot be carried is satisfied.
(5) The waterproof primer coating adopts aliphatic isocyanate, has good weather resistance and small component, has stronger permeability to cement base materials compared with the traditional primer coating, can greatly improve the bonding strength of waterproof materials and concrete base surfaces, and prolongs the service life.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (5)
1. The waterproof system structure for repairing the ballastless track railway bridge floor waterproof layer is characterized by comprising a bridge floor concrete base layer (1), a waterproof bottom coating (2) arranged above the bridge floor concrete base layer (1) and a waterproof top coating (3) coated on the waterproof bottom coating (2), wherein the waterproof bottom coating (2) is a two-component polyurethane coating, and the waterproof top coating (3) is an aliphatic polyurethane coating;
the waterproof layer comprises a bridge floor concrete base layer (1), and is characterized by further comprising an original waterproof layer (5), wherein a groove (4) is formed on the original waterproof layer (5) after diseases of the original waterproof layer (5) are removed, the edge of the waterproof base layer (2) is lapped on the groove (4), one end of the bridge floor concrete base layer (1) is provided with an anti-collision wall or a water retaining table (7), and the waterproof base layer (2) is coated on the anti-collision wall or the water retaining table (7).
2. The waterproof system structure for repairing a ballastless track railway bridge floor waterproof layer according to claim 1, characterized in that the coating amount of the waterproof base coat (2) is 0.4 kg/square meter or more.
3. The waterproof system structure for repairing the ballastless track railway bridge floor waterproof layer of claim 1, is characterized in that the coating weight of the waterproof surface coating (3) is more than or equal to 0.8 kg/square meter, and the dry film thickness is no more than 0.6mm.
4. The waterproof system structure for repairing the ballastless track railway bridge deck waterproof layer according to claim 1, wherein the waterproof base coat (2) is coated on the anti-collision wall or the water blocking table (7) at a height of 5-15cm.
5. The waterproof system structure for repairing the ballastless track railway bridge floor waterproof layer of claim 1, wherein the bridge floor concrete base layer (1) is provided with a rainwater pipe (8), and the waterproof bottom coating (2) is excessively coated on the inner wall of a pipeline of the rainwater pipe (8) from the bridge floor concrete base layer (1) and stretches into the rainwater pipe (8) by 3-7cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223115055.6U CN219508393U (en) | 2022-11-23 | 2022-11-23 | Waterproof system structure for repairing ballastless track railway bridge deck waterproof layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223115055.6U CN219508393U (en) | 2022-11-23 | 2022-11-23 | Waterproof system structure for repairing ballastless track railway bridge deck waterproof layer |
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| CN219508393U true CN219508393U (en) | 2023-08-11 |
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| CN202223115055.6U Active CN219508393U (en) | 2022-11-23 | 2022-11-23 | Waterproof system structure for repairing ballastless track railway bridge deck waterproof layer |
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- 2022-11-23 CN CN202223115055.6U patent/CN219508393U/en active Active
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